Question

which is classified as an inner transition element?
○ calcium
○ copper
○ fermium
○ helium

Explanation:

Inner transition elements are the lanthanides and actinides, located in the f - block of the periodic table. Calcium is an alkaline earth metal (s - block), copper is a transition metal (d - block), helium is a noble gas (p - block). Fermium is an actinide (part of inner transition elements as actinides are inner transition metals).

Answer:

C. fermium